EP 1825905 A4 20090415 - SEMIPERMEABLE COMPOSITE MEMBRANE AND PROCESS FOR PRODUCING THE SAME
Title (en)
SEMIPERMEABLE COMPOSITE MEMBRANE AND PROCESS FOR PRODUCING THE SAME
Title (de)
HALBDURCHLÄSSIGE VERBUNDMEMBRAN UND VERFAHREN ZUR HERSTELLUNG DERSELBEN
Title (fr)
MEMBRANE COMPOSITE SEMI-PERMÉABLE ET PROCÉDÉ DE FABRICATION DE LADITE MEMBRANE
Publication
Application
Priority
- JP 2005016617 W 20050909
- JP 2004290397 A 20041001
- JP 2005094604 A 20050329
Abstract (en)
[origin: EP1825905A1] The present invention aims at providing a composite semipermeable membrane excellent in water permeability and salt-blocking rate, and including an extremely small amount of unreacted polyfunctional amine components in the membrane, and at providing a process for producing the composite semipermeable membrane. A composite semipermeable membrane having a skin layer formed on the surface of a porous support, the skin layer comprising a polyamide resin obtained by interfacial polymerization of a polyfunctional amine component and a polyfunctional acid halide component, wherein the content of an unreacted polyfunctional amine component is 200 mg/m 2 or less after formation of the skin layer and before a membrane washing treatment, and the content of the unreacted polyfunctional amine component after the membrane washing treatment is 20 mg/m 2 or less.
IPC 8 full level
B01D 71/56 (2006.01); B01D 67/00 (2006.01); B01D 69/12 (2006.01)
CPC (source: EP KR US)
B01D 67/0006 (2013.01 - EP KR US); B01D 67/0081 (2013.01 - EP US); B01D 67/0088 (2013.01 - EP KR US); B01D 67/0095 (2013.01 - KR); B01D 67/0097 (2013.01 - KR); B01D 69/02 (2013.01 - EP US); B01D 69/105 (2013.01 - KR); B01D 69/1213 (2022.08 - KR); B01D 69/125 (2013.01 - EP); B01D 69/1251 (2022.08 - US); B01D 71/56 (2013.01 - EP KR US); B01D 2323/06 (2013.01 - EP KR US); B01D 2323/50 (2013.01 - KR)
Citation (search report)
- [XY] EP 0394038 A2 19901024 - DU PONT [US]
- [Y] DATABASE WPI Week 200416, Derwent World Patents Index; AN 2004-159147, XP002516613
- [XY] DATABASE WPI Week 200029, Derwent World Patents Index; AN 2000-331829, XP002516614
- [Y] DATABASE WPI Week 198616, Derwent World Patents Index; AN 1986-102828, XP002516609
- [Y] DATABASE WPI Week 197813, Derwent World Patents Index; AN 1978-24199A, XP002516610
- See also references of WO 2006038425A1
Designated contracting state (EPC)
DE ES IT
DOCDB simple family (publication)
EP 1825905 A1 20070829; EP 1825905 A4 20090415; JP 2006122887 A 20060518; JP 4656503 B2 20110323; KR 100969049 B1 20100709; KR 20070057268 A 20070604; US 2008053893 A1 20080306; US 2010173083 A1 20100708; WO 2006038425 A1 20060413
DOCDB simple family (application)
EP 05781966 A 20050909; JP 2005016617 W 20050909; JP 2005094604 A 20050329; KR 20077009884 A 20050909; US 66442805 A 20050909; US 72834710 A 20100322